Evaporator



jan 299 O. M. NELSON EVAPORATOR Filed Oct. 25, 1919 2 Sheets-Sheet l Jam 29, 1924-.

o. M. NELSON EVAPORATOR Filed 00's. 25, 1919 E Shams-Sheet 2 in the claim.

Patented Jan. 29, 1924.4

-'UNITED STATES IPlxrlilv'r oFFicEL.

OSCAR. M. NELSON, F NEW HAVEN, CONNECTICUT, ASSIGNOR TO THE UNITEDSTATIB SUGAR C0., OF NEW HAVEN, CONNECTICUT, A CORPORATION.

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Application led october 28, 1919. Sgrial No. 332,786.

T o all whom t I:mty concern.'

Be it known that l, OSCAR M. NELsoN,.a citizen of the United States, residin at New Haven,'in the county of New aven and State of Connecticut, have invented a new and useful Improvement in Evaporators; andl do hereby declare the following, when taken in connection with the accompanying drawings and the characters of reference marked thereon, to be a full, clear,

and exact description of the same, and which said drawings constitute part of this application, and represent, in-

F ig. 1 a sectional view of an evaporator accomplish the desired result of condensing liquors in a simplified manner and the invention consists in the construction as hereinafter described and particularly recited In carrying out my invention I employ a cylindrical body 5 of suitable size and built up from sheet'l metal in the usual way, provided with lugs 6-by which it may be suitably Supported. The upper part of the body 7 1s crowned and mounted upon the crown is a. closed dome 8 which may have an outlet 9 for excess vapor, as indicated in broken lines, if such outlet is necessary. The bottom 10 is concave, leading to a mud discharge pipe 11. Supported upon the bottom by legs 12 is a drum 13 smaller in diameter than the diameter of the casing and extending through this drum and coupled with the top and bottom thereof, are a series of tubes 14. As clearly shown in Figure 3 of the drawings, the tubes are arranged in a special way. A number of the pipes are arranged equidistant from each other in the form of a square at the centre, the pipes on each side'of` the square forming the arms .inch in the other direction.

the central tubes but the pipes at the ends of the-arms are arranged in transverse rows closer together than the longitudinal rows, then in the corners formed by the arms of. the cross are placed pipes in rows in line with the pipes of the arms of the cross. To illustrate, the'distance between the pipes 15 and 16 will be one .and one-half inches while the distance between the pipes and 17 will be one inch. In other words, the pipes around the central part of the drum and eX- tending toward each side will be spaced an inch and one-half in one direction and one This permits of free circulation of steam around the pipes and permits the steam to freely circulate among the pipes around the outer circumference of the drum. Opening into the top of the drum isa vapor return pipe 18 provided with a. Haring funnel mouth 19 and in the drum below the said pipe 18 is a baiie plate 20. AEntering one side of the body is an inlet steam pipe 21 which is formed with .branches 22 and 23 which enter the pipe 18 near its lower end. Juices are admitted to the body through an inlet pipe 24 provided with a valve 25 and may be withdrawn from the body through an outlet pipe 26 provided with a valve 27. Connected with the body is the usual pressure gage 28 and thermometer 29. The case is also .provided with sight. openings 30 and 3l through which the contents of the body may be observed. In the opening from the bottom of the drum is -a condensed steam discharge pipe 32. Juices to be condensed are run into the body until the drum is covered. Steam is then admitted under the desired pressure and this steam enters the pipe 18 and being directed downward creates a suction in the top of the pipe 18 so as to draw the vapors and -without the aid of pumps or other me chanical lation.

I claim: A ooncentrator comprising a closed evaporating` chamber and a heat-ing drum, the heating drum comprising a steam space, a Vertical tube wholly Within the closed chamber opening at, its upper end into the upper part of the chamber and at its lower end into the steam space and 'means to discharge power to maintain proper circusteam l downwardly through said tube, whereby vapors from the upper part of the chamber are aspirated into the steam space.

In testimony whereof, I have signed this l5 specification in the presence of two subscribing witnesses.

OSCAR M. NELSON. fitnesses FREDERIC C. EARLE, J. HAROLD F LYNN. 

